NDLI: Morphology and defect structure of the CeO 2 ( 111 ) films grown on Ru ( 0001 ) as studied by scanning tunneling microscopy

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Morphology and defect structure of the CeO 2 ( 111 ) films grown on Ru ( 0001 ) as studied by scanning tunneling microscopy

Content Provider	Semantic Scholar
Author	Shaikhutdinov, Shamil Freund, H. J.
Copyright Year	2006
Abstract	The morphology of ceria films grown on a Ru(0001) substrate was studied by scanning tunneling microscopy in combination with low-energy electron diffraction and Auger electron spectroscopy. The preparation conditions were determined for the growth of nmthick, well-ordered CeO2(111) films covering the entire surface. The recipe has been adopted from the one suggested by Mullins et al. [D.R. Mullins, P.V. Radulovic, S.H. Overbury, Surf. Sci. 429 (1999) 186] and modified in that significantly higher oxidation temperatures are required to form atomically flat terraces, up to 500 Å in width, with a low density of the point defects assigned to oxygen vacancies. The terraces often consist of several rotational domains. A circular shape of terraces suggest a large variety of undercoordinated sites at the step edges which preferentially nucleate gold particles deposited onto these films. The results show that reactivity studies over ceria and metal/ceria surfaces should be complemented with STM studies, which provide direct information on the film morphology and surface defects, which are usually considered as active sites for catalysis over ceria. 2006 Elsevier B.V. All rights reserved.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://nano.iphy.ac.cn/N04/papers/NO4_papers%20all%20pdf/HJ_Gao.0615.pdf
Alternate Webpage(s)	http://w0.rz-berlin.mpg.de/hjfdb/pdf/471e.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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